Make TracingImpl take a Shell* and args, instead of an ApplicationImpl*.

services/native_viewport/app_delegate.cc

Index: services/native_viewport/app_delegate.cc
diff --git a/services/native_viewport/app_delegate.cc b/services/native_viewport/app_delegate.cc
index 0848298f165af096d6ee3c64a7585c772e5cbff8..f1f53fcc0b3aba7f34b454adbebfccad0d4ac58b 100644
--- a/services/native_viewport/app_delegate.cc
+++ b/services/native_viewport/app_delegate.cc
@@ -33,7 +33,7 @@ void NativeViewportAppDelegate::Initialize(mojo::ApplicationImpl* application) {
   application_ = application;
 
   InitLogging(application);
-  tracing_.Initialize(application);
+  tracing_.Initialize(application->shell(), &application->args());
 
   // Apply the switch for kTouchEvents to CommandLine (if set). This allows
   // redirecting the mouse to a touch device on X for testing.